Support for ESP-NOW Wireless Remote Control (#3237)

* Initial checkin for ESP-NOW remote feature

* cleanup irrelevant comment

* don't bring in espnow package includes when feature disabled

* Formatting and removing inaccurate call mode hardcoding

* Fork ESP Now code by platform (8266 v. esp32)

* compiled html update

* Disable ESP-NOW remote by default on ESP32 until tested

* Enable ESP-NOW remote for ESP32

* Rename ESP NOW define

---------

Co-authored-by: cschwinne <dev.aircoookie@gmail.com>

wled00/set.cpp

@@ -48,6 +48,14 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
 
     noWifiSleep = request->hasArg(F("WS"));
 
+    #ifndef WLED_DISABLE_ESPNOW
+    enable_espnow_remote = request->hasArg(F("RE"));
+    strlcpy(linked_remote,request->arg(F("RMAC")).c_str(), 13);
+
+    //Normalize MAC format to lowercase
+    strlcpy(linked_remote,strlwr(linked_remote), 13);
+    #endif
+
     #ifdef WLED_USE_ETHERNET
     ethernetType = request->arg(F("ETH")).toInt();
     WLED::instance().initEthernet();